Merge a3363fa9bcdda227e78bef4af4c4789818047484 into 5cfe294063c9317928d8da3387004e3eaddc991a

src/invidious/config.cr

@@ -332,6 +332,23 @@ class Config
       end
     end
 
+    # Check if the domain configuration is valid
+    if (domain = config.domain).nil? || domain.empty?
+      puts "Config: 'domain' is required/can't be empty"
+      exit(1)
+    elsif parsed_domain = URI.parse(domain)
+      if domain != parsed_domain.domain
+        puts "Config: 'domain' is invalid.
+        
+        if parsed_domain.host.presence
+          puts "Config: (Hint) Did you mean #{parsed_domain.host} ?"
+        else
+          puts "Config: (Hint) 'domain' should look like this: invidious.example.com"
+        end
+        exit(1)
+      end
+    end
+
     return config
   end
 end